Earthquake occurrences

Time, location, severity, and mechanism of earthquake events, including the frequency and history of events in a given area.
This category is also used for seismic activity, seismicity, strong motion, and ground motion.
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Hydrostructural Maps of the Death Valley Regional Flow System, Nevada and California--Map A: Structural Framework, Neogene Basins, and Potentiometric Surface; Map B: Structural Framework, Earthquake Epicenters, and Potential Zones of Enhanced Hydraulic Conductivity

The locations of principal faults and structural zones that may influence ground-water flow were compiled in support of a three-dimensional ground-water model for the Death Valley regional flow system (DVRFS), which covers 80,000 square km in southwestern

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Elements of infrastructure and seismic hazard in the central United States - Database

This digital map database consists of the ESRI ARC/INFO Version 7.0.2 coverages used to generate the plates in Professional Paper 1538-M (1994). Base-data is from 1:2,000,000-scale Digital Line Graph (DLG) data (roads, railroads, streams, water bodies,

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Digital map showing faults, lineaments, and earthquake epicenters in the Pahute Mesa 30' x 60' quadrangle, Nevada, in Arc/Info ASCII generate and Arc/Info export formats

This digital map compilation incorporates fault, air photo lineament, and earthquake epicenter data from within the Pahute Mesa 30' by 60' quadrangle, southern Nye County, Nevada (fig. 1). The compilation contributes to the U.S. Department of Energy's

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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Damaging Earthquakes

This cover consists of location and size information for historical and recent earthquakes that caused Modified Mercalli Intensity (MMI) VI (6) or higher in the map area. There were 26 earthquakes that caused that level of damage. The most reknown are the

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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Instrumental earthquake locations

This cover contains the catalog of earthquake locations, within the project boundary, recorded by the Saint Louis University and Memphis State University seismic networks from July 1974 through December 1995.

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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Modified Mercalli Intensity contours for the earthquakes from December 16, 1811 at 815 GMT through June 10, 1987 at 2348 GMT

Isoseismals of historic Central U.S. earthquakes are contained in 26 separate coverages. Margaret Hopper provided these isoseismals after reexamining the intensity data and re-calculating the isoseismal contours. She generated isoseismal contours for eac

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Digital spatial data for the map "Earthquakes in and near the northeastern United States, 1638-1998"

The data are those used to make a large-format, colored map of earthquakes in the northeastern United States and adjacent parts of Canada and the Atlantic Ocean (Wheeler, 2000; Wheeler and others, 2001; references in Data_Quality_Information, Lineage). Th

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Seismotectonic maps in the vicintiy of New Madrid, Missouri database

This digital map database consists of the ESRI ARC/INFO Version 7.0.3 coverages used to generate the maps in Map Series MF-2264 A to E (Rhea and Wheeler, 1994a,b, Rhea and others, 1994, Wheeler and Rhea, 1994, Wheeler and others, 1994) and I-2521 (Rhea an

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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Reported Modified Mercalli Intensity values

This cover contains locations with intensity values associated with felt reports from damaging earthquakes in the lower Wabash Valley occurring from 1811 through 1987. Margaret Hopper collated these data from historical data gathered from previous resear

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Geologic map of the Frisco quadrangle, Summit County, Colorado

New 1:24,000-scale geologic mapping along the Interstate-70 urban corridor in western Colorado, in support of the USGS Central Region State/USGS Cooperative Geologic Mapping Project, is contributing to a more complete understanding of the stratigraphy, st

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